💙🦦 North American river otters are considered a keystone species, which means other species in the same habitat depend on the existence of river otters. Their presence also reflects the health of the ecosystem around them. 💧👋 See them at American Trail! #WorldOtterDay | Smithsonian’s National Zoo and Conservation Biology Institute

For thousands of years, sea otters played an important role in the cultures of Oregon's coastal people. Now, there’s an effort to bring them back. | Oregon Zoo